Island



(No Model.)

W. A. 85 A. P. LUTHER.

COMPOSITION FOR COVERING PULLEYS, ROLLERS, &c. No. 395,283. Patented Dec. 25, 1888.

William .17. L when and .flddz' 9071 F. L uiher." WITNESSES XVILLIAM A. LUTIIER AND ADDISON ATENT FFMIE F. LUTHER, OF OLNEYVILLE, RHODE ISLAND.

COMPOSITION FOR COVER! NG PULLEYS, ROLLERS, &.o.

SPECIFICATION forming part of Letters Patent No. 395,283, dated December 25, 1888.

Application filed August 6, 883- 20 all whom it may concern.-

Be it known that we, \VILLIAM A. LUTHER and ADDISON F. LUTHER, citizens of the United States of America, residing at Olneyville, in

5 the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Composition for Covering Rollers; and we do herebydeclare the following to be a full, clear, and exact description of the IQ invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to letters or figures of reference marked thereon, which forms a I 5 part of this specification.

Our invention relates to new and useful improvements in compositions to be applied as a peripheral covering for rollers, adapted to drive, by frictional contact, the rotary parts of machinery, and especially spindles of spinning machines. The composition is adapted to be applied to driving-rollers in place of leather, which has heretofore been commonly employed for such purpose.

Our invention consists of a composition of rawhide, bone, and horn, mixed and thor oughly incorporated with each other and applied to the surface of the rollers by a glueand-vinegar or acetic-acid solution, forming a smooth, hard, and durable surface, which will not slip on a contacting-sulface, spindle, or roller, and thereby more readily rotate the same.

In the accompanying drawing we have 3 5 shown our improved composition applied to a roller of ordinary construction.

To prepare our composition, the rawhide Serial No. 282,855. (No specimens.)

and horn are separately ground, and the bone is first calcined or burned and then ground.

The several ground constituents are then 40 thoroughly mixed, the roller is given a coat of glue mixed with vinegar or acetic acid, and the above composition rolled into it. A second coat of glue and vinegar is then applied to the surface of the above layer on the roller and the composition again rolled into it. This operation is continued until the required thickness is obtained. As different rollers for various purposes require a difference in propor tion of the ingredients, it is hardly practicable to give a stated proportion of each, and will be determined by practical usage and experience. The vinegar in the glue moistens the rawhide, forming a pulp, which becomes, as it dries, almost as hard as iron. I11 fact, it is so hard that it is turned off in a lathe like iron.

Having thus described our invention, what we claim as new, and desire to secure by Let ters Patent, is

The herein-described composition for covering driving-rollers and analogous purposes, consisting of ground rawhide, ground horn, burned or calcined bone incorporated with each other, and a glue-and-vinegar as set forth.

In testimony whereof we affix our signature in presence of two witnesses.

WVILLIAM A. LUTHER. ADDISON F. LUTHER.

Witnesses:

WM. A. OARROLS, WM. A. PHILLIPS.

solution, 6 5' 

